Sifting-screen



l (No Model.) 3 Sheets-Sheet 1.

J. ARELI.

SIFTING SGREBN, &c. No. 564,179. Patented July 21, 1896.

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TTOHNEY.

`(N0 Model.) 3 Sheets-sheet 2. J. ARELI. SIFTING SCREEN, &c.

Patented July 21, 1896.

W/TNESSES:

ATTORNEY.

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(Nc Model.) 3 Sheets-Sheet 3,'

J. ARBLI. SIPTING SCREEN, &c.

No. 564,179. i Patented July 21, 1896.

{f7/ @6v/#WMM ATTORNEY.

UNITED STATES PATENT OFFICE.

JOSEPH ARELI, OF DENVER, COLORADO.

s| FT|NG-scREEN, sw.

SPECIFICATION forming part of Letters Patent No. 564,179, dated July 21,1896.

Application filed May l2, 1893. Serial No. 473,96 7. (No model.) i

To all whom. t may concer/z.'

Be it known that I, JOSEPH ARELI, a citizen of the United States,residing at Denver, in the county of Arapahoe and State of Colorado,have invented certain new and useful Improvements in Screens forSif'ting and Separating Grain, Ores, Coal, Minerals, Rocks, dac. and Ido hereby declare the following to be a full, clear, and exactdescription ofthe invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the figures lof reference markedthereon, which form a part of this specification.

My invention relates to that class of screens l in which the material tobe sifted or separated is placed upon the screen, through the meshes ofwhich the smaller pieces or grains pass, while the larger portionsremain in top of and run down the screen.

The obj ects of my improvements are, first, to afford facilities for theproper adjustment of' the size of the openings or meshes of the screen,so as to suit the various materials to be screened; second, to provide adevice for indicating the various sizes of the mesh, so that the screenmay be accurately and readily adjusted to any desired size of mesh;third, to provide suitable means for automatically keeping the meshesclean and free of clogging up while in use, and, fourth, to provide ascreen which, though simple in construction and inexpensive in cost, iseasily operated and adjusted, and comprises various details ofconstruction and arrangements of parts, all as hereinafter described,and particularly pointed out in the appended claims. I attain theseobjects by the mechanism illustrated in the accompanying drawings, inwhich Figure l is a side elevational view of my entire machine,comprising my improved screen and its supporting framework. Fig. 2 is aplan view of the oscillating frame, comprising two screens mortisedtherein. Fig. 3 is a similar view, on an enlarged scale, of a screenseparate from its supporting framework. Fig. 4 is a longitudinalsectional view taken on the lines Z Z, Fig. 3. Fig. 5 is acrosssectional view on an enlarged scale, taken on the line X X, Fig. 2,part being broken away tobetter show the cleaning-brushes. Fig. 6

taken along the line L L, Fig. 8.

is a detail elevational view of the brush. Fig. 7 is a similar viewtaken on the line X X, Fig. 6. Fig. 8 is a partial side elevationshowing lifting apparatus. Fig. 9 is a section Fig. 1Q is an enlargedsection taken along the line P P, Fig. 8.

Similar figures refer to similar parts throughout the several views. y

The upright framework for supporting the oscillating framejis composedof the standards 28 28 and the side and end connecting beams 29 29. Fromthe upper side beams 29 29 hangers 30 30 depend, the lower ends of whicharepivotally connectedto the oscillating frame l0. ,This frame isrectangular in form and is made of right-angled rails, either iron orwood, and is adapted to support from one to four or more screens,preferably two, as shown in Fig. 2. The rails of the frame lO areprovided near the corners and near the centers of the side rails withmortises, within which the ends '9 9a of the outside screenframe 1 arefitted.

The screens proper comprise two sets of parallell rods 4 and 7, made ofwire or any other suitable material. The ends ofthe upper set 4 aremortised in theend rails 60 of the rectangular frame l, while the endsof the lower set 7 are similarly connected to the rectangular frame 2,which is slightly smaller and fits withinthe frame 1. The spaces betweenthe parallel rods of each set are practically the same size as thediameter of the rods.

The rods 4 of the upper set are arranged directly above the spacesbetween the rods 7 of the lower set, so that when the two sets of rodsare adjusted to occupy the same horizontal plane the spaces between therods are entirely closed.

The side rails of frame 2 are provided at their lower edges withoutwardly-projecting flanges, which extend slightly beyond the verticalplane of the outer faces of the side rails of frame 1.

In the middle of each screen, and connecting the two sides of frame l, abeam 3 is placed, the ends of which are turned down at right angles andare securely fastened by bolts or other suitable means to the sides offrame 1. The center of thisy beam 3' isprovided with a bearing throughwhich passes av vertical shaft 16, provided at its upper extremity witha handwheel 1S and at its lower end with a beveled gear-wheel 20, whichengages a beveled gear-wheel 21 placed on a horizontal shaft 22, theends of which bear on the turned-down parts of beam 3. Shaft 22 isprovided near its ends and directly over the sides of frame 1 withgear-wheels 23 23, which mesh with teeth cut in the upper side of barsor racks 24 24, which are placed above the sides of frame 1, resting onand made to slide in projections 51 of boxes 25 25, two of which arefastened to each side of frame 1 by means of bolts passing throughflanges on said boxes and at equal distances from the center of beam 3.Directly under these boxes and in line with them, boxes 25 are located,fastened to flanges on the sides of frame 2 by means of bolts passingthrough fianges on said boxes. On the inside of boxes 25 thread is cutto receive the threaded part of bolts 26, the upper part of which passesthrough boxes 25, and which are provided on top with gear-wheels 50whichengage teeth cut in thesides of bars or racks24 24. It will thus bereadily seen that byturning shaft`16 shaft '22, with gear-wheel 23, willrevolve, which will cause racks 24 to slide in the `projections 51 ofboxes 25, which racks 24 in theirturn will cause gear-wheels 50 torevolve and with them shafts 26 26, which, as they Vare screwed inboxes25a of frame 2 and pass freely through boxes 25 of frame 1, willseparate lframes 1 and 2.

mines the mesh of the screen.

Parallel braces 6 6 extend transversely across the screen and areconnected at their 2 in proper relative location during their ad-v`justment.

Adial or graduated disk 17 is attached to beam 3-'and islso located thatbolt 16 passes through its center. A pointer 19 is rigidly secured tobolt 16, lying close to the dial so as to accurately indicate thedegrees marked thereon.

A frame 11 composed of :angle rails is connectedto the upright posts 2S28 a short dis-Y tance below the frame 10. A series of brushes 14 areadj ustably connected to the side rails of frame 11. These brushes aremade preferably of peassava-root bristle and are firmly heldbetween twometal plates 13 13 riveted together by rivets 15. at `their upper endsthe brushes 14 andare provided at their `lower `ends with slots 27a Thisrelative movement of frames 1 and -2 regulates the distance betw'een thetwo sets of parallel rods, and thus deter- Uprights 12 supportthroughwhich pass bolts 27, which also pass through slots 40 in the side railsof frame 11. Nuts engage the screw threaded ends of these bolts 27 andbind the arms 12 to the rails. This slot and bolt connection enables thebrushes to be adjusted vertically so as to be in contact with the rods 4and 7, and as the screen oscillates these brushes keep the meshes cleanand clear by dislodging any particles or grains which may becomefastened between the rods.

Vhile any suitable means may be'used for oscillating the frame 10, Ipreferably employ the construction illustrated in Fig. 1 of thedrawings, comprising a fiy-wheel 31 revolubly mounted on a shaftsupported by the crossbars 29, a handle 34 and pulley 35 fixed thereto,a pulley 36 'journaled in bearings secured to one of the up1'ights28,and belt`38 passing around the pulleys.

The particular force of `connection between the frame 10 and pulley 36for impartingmotion to the frame is not material, but some suchconstruction as shown in Fig, 2 isfound preferable. This constructionembraces a crank-shaft l4S with Acrank 49, to one end of whichthe-pulley 3G is fixed,the other end being journaled ina bracketsupported by the opposite upright 28; 4a pitman-46, connected to theshaft 4S and hinged at 47 to the curved arm 45, which is hinged at `eachend 4444 to the end rail of frame 10.

Strips of sheet metal43 may be placed over the places where the ends 9and 9 of the screen-frames lare mortised Vto the frame 10, while a strip42 is placed over the place where the ends of two screens cometogether,yand a strip 41 is placed wherethe screenframe 1 is mortised in "thelower end of vframe 10 for the purpose of forming an even' surface forthe material to pass over.

In the frame of my `invention illustrated in 2 two separate screens aremortisedlin the frame 10. The mesh of the'two screens may differ insize, so that thematerial sifted may be vsortedin threegrades, onepassing through the mesh ofthe first screen, another through the largermesh of the second screen, and a third grade, being too large 'to pass"through either mesh, `remainson `top `and runs down the screen.

Vhile I have shown my screen-frame las adapted to Abe oscillated, I do`not wish to limit myself Vto such form, as my improved means foradjusting the mesh andfindicating the size thereof may be-usedequallyeas well on -a stationary screen.

The operation is as follows: The bolt 16 is turned until the mesh of thescreen is approximately the size desired for the particular material to`be sifted, whether grain, ore, or coal, or any yother materialwhatsoever. The pointer is then turnedto that degree in the dialwhichhas been previously found to indicate the proper-sized mesh' forlthepartie ular' material. Thebru'shes l4a're then, if

IOO

IIO

necessary, adjusted to bear against-the screen. This adjustment isrendered necessary by the movement of the frame 2 and rods 7 toward andaway from the brushes in the adjustment of the mesh of the screen. Theore, grain, or whatever material is to be sifted is then placed in thehopper 33 and the screen set in motion by the revolution of the flywheel31. The agitation of the screen will cause the smaller grain or piecesto fall through the meshes into a receptacle, while the larger grain orpieces will run down the screen, and may be received in a receptacleplaced below the end of the screen.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent, is-

1. In a screen or sifter, the combination of an upper frame, a lowerframe, parallel rods supported in each frame, bolts passing through theupper frame and engaging at their lower threaded ends in threadedopenings in the lower frame, bars engaging the heads of such bolts, andmeans for simultaneously horizontally reciprocating such bars, wherebythe lower frame may be raised or lowered and the mesh of the screenadjusted, substantially as described.

2. In a screen or sifter, the combination of an upper frame, a lowerframe, parallel rods supported in each frame, means for adjustablyconnecting said frames, horizontallyreciprocating bars engaging suchconnecting means, and a horizontal shaft engaging and simultaneouslyreciprocating such bars, whereby the frames are relatively adjusted andthe mesh of the sifter or screen regulated, substantially as described.

3. The combination in a sieve, sifter or screen of therectangularframe1, parallel rods 4 supported thereby, the rectangular frame 2 with frame1 supporting parallel rods 7 below rods 4, outwardly-extending flangesaround the bottom of frame 2 extending beyond the outer faces of frame1, a beam 3 fastened to the sides of frame 1, a bolt 16 passing throughthe center of said beam, having on its upper extremity hand-wheel 18 andon its lower extremity a beveled gear-wheel 20, ahorizontal shaft 22bearing in the turned-down ends of beam 3, provided with a beveledgear-wheelv 21 which engages gear-wheel 2O on shaft 16, and with twogear-wheels 22 22, racks or bars 24 with teeth cut in their upper sideto engage gear-wheel 23 of the shaft 22 and with teeth cut in the sideon each end, and sliding over and held in place by projections 51 ofboxes 25, threaded bolts 26 26 passing freely through boxes 25 which arefastened to the sides of frame 1 and screwed into threaded boxes 25a,fastened to the sides of frame 2, and provided on their upper extremitywith gear-wheels 50 5() which engage vertical teeth of racks 24,substantially as shown and described.

4. In a screen or sifter, the combination of an upper frame, a lowerframe, parallel rods supported in each frame, means for adjustablyconnecting said frames, horizontally-reciprocating bars engaging suchconnecting means, a horizontal rotating shaft engaging andsimultaneously reciprocating such bars, and a vertical bolt or shaft forrotating said horizontal shaft, substantially as described.

5. A screen or sifter, composed of two rectangular frames, parallel rodssupported in each frame, means for adjustably connecting such frames, avertical shaft for operating such means, a pointer connected to suchshaft and a dial surrounding the shaft whereby the relative positions ofthe frames are indicated, substantially as set forth.

G. In an adjustable sieve, or sifter, means for effecting the adjustmentof the mesh, a vertical rotating shaft for operating such means, ahorizontal dial surrounding the shaft, and a pointer attached to theshaft, whereby the size of the mesh is indicated, substantially asdescribed.

7 In a screen or sifter, the combination of an upper frame, a lowerframe, parallel rods supported in each frame, bolts passing through theupper frame and engaging at their lower threaded ends in threadedopenings in the lower frame, means for simultaneously rotating saidbolts, and an automatic indicator connected with such means forindicating the relative positions of the frames, substantially asdescribed.

8. In a screen or sifter, the combination of an upper frame, a lowerframe,` parallel rods supported in each frame, means for adjustablyconnecting said frames, horizontally-reciprocating bars engaging suchconnecting means, a horizontal rotating shaft engaging andsimultaneously reciprocating such bars, a vertical shaft for rotatingsaid horizontal shaft, and a pointer attached to such vertical shaft forindicating the relative positions of the frames and the size of thescreen-mesh, substantially as set forth.

9. The combination of the oscillating frame 10, the uprightsupporting-frame, rails 11 having a series of slots 40, brushes 14,'supporting-arms 12 having slots 27a at'their lower ends, and bolts 27passing through slots 272b and 40 whereby the brushes are adjustably IOOIIO

attached to the rails 11, substantially as de-

